Which is an example of convection?

in a mountain forest, the sun heats up the ground.
on a hot day, amaya pours water on her face to cool off.
at the beach, stephan’s feet get hot walking across the sand.
above the sea, warm air rises, cools, and sinks.

i think if it were me i whould divide 300 dide 15

step-by-step explanation:

if they have a finite resultant

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)